<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>. 
//
// This file was modified by contributors of "BOINC Web Tweak" project.

require_once("../inc/bossa.inc");

// Bossa example #2.
// Show the user an image and ask them to click on the ellipse
// This version does replication;
// a job is considered done if either
// - 2 instances are positive and match within +- 20 pixels
// - 2 instances are negative
// - there are 10 finished instances
//   (in which case the job is marked as inconclusive)

function job_show($job, $inst, $user) {
	$info = $job->get_opaque_data($job);
	$path = $info->path;
	echo "
		<h2>Find the Ellipse!</h2>
		<form method=get action=bossa_job_finished.php>
		Click on the center of the ellipse.
		If you don't see one, click here:
		<input type=submit name=submit value=None>
		<br><br>
		<input type=hidden name=bji value=$inst->id>
		<input type=image name=pic src=$path>
		</form>
	";
}

function job_issued($job, $inst, $user) {
	$insts = $job->get_instances();
	if (count($insts) == 1) {
		$job->set_priority(2);
	} else {
		$job->set_priority(0);
	}
}

function job_finished($job, $inst) {
	// record the user's response
	//
	$response = null;
	if (get_str('submit', true)) {
		$response->have_ellipse = 0;
	} else {
		$response->have_ellipse = 1;
		$response->cx = get_int('pic_x');
		$response->cy = get_int('pic_y');
	}
	$inst->set_opaque_data($response);

	// see whether we have a consensus
	//
	$insts = $job->get_finished_instances();
	$n = count($insts);

	$results = null;
	foreach ($insts as $inst) {
		$results[] = $inst->get_opaque_data();
	}
	for ($i=0; $i<$n-1; $i++) {
		$r1 = $results[$i];
		for ($j=$i+1; $j<$n; $j++) {
			$r2 = $results[$j];
			if (compatible($r1, $r2)) {
				$job->set_state(BOSSA_JOB_DONE);
				return;
			}
		}
	}

	// no consensus - see whether we've reached replication limit
	//
	if ($n >= 10) {
		$job->set_state(BOSSA_JOB_INCONCLUSIVE);
		return;
	}

	// still looking for consensus - get another instance
	//
	$job->set_priority(2);
}

// two results are compatible if neither found an ellipse,
// or they both did and centers are within 20 pixels
//
function compatible($r1, $r2) {
	if ($r1->have_ellipse) {
		if ($r2->have_ellipse) {
			$dx = ($r1->cx - $r2->cx);
			$dy = ($r1->cy - $r2->cy);
			$dsq = $dx*$dx + $dy*$dy;
			return ($dsq < 400);
		} else return false;
	} else {
		return !$r2->have_ellipse;
	}
}

function job_timed_out($job, $inst, $user) {
	$job->set_priority(2);
}

function job_summary($job) {
	$info = $job->get_opaque_data();
	return "<a href=".URL_BASE."$info->path>View image</a>";
}

function instance_summary($info) {
	if ($info->have_ellipse) {
		return "ellipse ($info->cx, $info->cy)";
	} else {
		return "no ellipse";
	}
}

function user_summary($user) {
	return "";
}
